High Tension/Fridge

• Plot Hole / Fridge Logic: If Marie and the killer are the same person, how can she be in the house/gas station parking lot when the killer is in the cornfield/speeding away?
  • Possibly her perceptions of time are distorted, so she can do certain things as the killer and then react to them as Marie. But still, where did that truck come from?!
  • Another one that is actually a physical impossibility: Marie is a woman, and therefore lacks certain body parts. If she is the killer, then how does "he" fellate himself with the dead girl's head or implicitly rape Alex? Also, when Marie and Alex are locked in the back of the truck... WHO'S DRIVING?!?
    • Having not seen the movie, she does have fingers.